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https://issues.apache.org/jira/browse/HTTPCLIENT-1195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13401754#comment-13401754
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Sebb commented on HTTPCLIENT-1195:
----------------------------------
Looks like this is because the same set is used to escape both userinfo and
fragment but userinfo does not allow / @ ? in a URI.
There should probably be a separate set for userinfo.
Also just discovered that "[" and "]" were added to the reserved set by RFC
2732 (IPv6).
> URIBuilder-created query strings are double-escaped
> ---------------------------------------------------
>
> Key: HTTPCLIENT-1195
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1195
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient
> Affects Versions: 4.2 Final
> Environment: java version "1.6.0_24"
> OpenJDK Runtime Environment (IcedTea6 1.11.1) (6b24-1.11.1-4ubuntu3)
> OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
> Reporter: Chris K. Jester-Young
> Fix For: 4.2.1
>
> Attachments: HTTPCLIENT-1195-2.patch, HTTPCLIENT-1195.patch
>
>
> When setting parameters in URIBuilder, the keys and values are
> double-escaped: once in URIBuilder.build(), and again in
> URI.appendSchemeSpecificPart(). Example:
> URIBuilder ub = new URIBuilder("http://www.google.com/";);
> ub.addParameter("foo=bar", "baz&qux");
> ub.build(); // http://www.google.com/?foo%253Dbar=baz%2526qux
> In order to avoid this problem, URIBuilder.build() should use URI's
> one-argument constructor, which does not try to do extra escaping.
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